TB 5-4220-200-12-1
4-8
ANNUAL AND SEMI-ANNUAL CHECK AND SERVICES.
Table 4-1 contains the instructions for conducting annual preventive maintenance. Table 4-2 contains Instructions
for completing semi-annual preventive maintenance.
4-9
INSPECTION PROCEDURES.
a.
O-Rings - Inspect for dry rot. damage, and distortion; replace if necessary.
b.
Gaskets - Inspect for damage and loss of compressron capabilities; replace if necessary.
c.
Rubber Parts - Inspect for dry rot, tears, distortion; replace if necessary
d.
Plastic Parts - Inspect plastic parts for depressions. cracks, other damage; replace if necessary.
e.
Filter - Inspect for distortion, pin holes, rust and other damage; replace if necessary.
f.
Metal Part - Inspect for dents. rust cracks, and other damage; replace if necessary.
Table 4-1. ANNUAL UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES
TOTAL MANHOURS REQUIRED 3.2
Sequence
Functions to be Performed
Work
Number
Time
Procedure
M/H
1
DISASSEMBLY
Disassemble all components of the open circuit SCUBA system in accordance with
0.8
disassembly instructions in Section V and Section VI.
Clean all parts as needed in accordance with cleaning instructions in Section III. para-
Inspect and replace parts as necessary in accordance with inspection instructions in
Section III, paragraph 4-8.
2
REASSEMBLY AND ADJUSTMENT
Reassemble and adjust the system in accordance with Section V and Section VI.
1.8
3
OPERATIONAL CHECK
Perform step 4 of Table 3-1 "Weekly Preventive Maintenance Checks and Services".
0.1
4
INTERNAL TANK INSPECTION (VISUAL)
Perform inspection in accordance with instructions contained in Section VI, 4-18.
0.5
4-2
